HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / CA

SAMUEL PASCAL MASSION, MD

HOSPITALIST

Graduated: 2023

Also: INTERNAL MEDICINE

NPI: 1821793654

Practice Locations (1)

490 ILLINOIS ST

SAN FRANCISCO, CA 941432510

Source: CMS National Downloadable File, September 2026.